lueasohi



(No Model.) 2 Sheets-Sheet 1,

O. LURASGHI.

SEWING MACHINE.

No. 476,664. Patented June '7, 1892..

21/11 86666 enz'or' (No Model.) 2 Sheets-Sheet 2.

O'. LURASOHI. SEWING MACHINE.

, No. 476,664. Patented June 7, 1892.

UNITED STATES PATENT OFFICE.

CARLO LURASOHI, OF MILAN, ITALY.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 476,664, dated June '7, 1892.

Application filed October 2'7, 1891. Serial No. 110,000- (No model.) Patented in Italy May 16, 1889, XLIX, 290; in Belgium November 30, 1889, No. 88,502; in England December 8, 1889, No. 19,448; in France January 8, 1890, No. 201,567; in A tria-Hnngary February 20, 1890, No. 31,393 and No. 7,112; in Germany August 9, 1890, No. 58,072, and in Switzerland December 16,1890, No. 2,513.

' lan, Italy, have invented new and useful Improvements in Sewing-Machines, (for whichI have obtained patents in the following countries: Austria-Hungary, dated February 20, 1890, No. 31,393 and No. 7,112; Italy, dated May 16,1889,Vol. 49, No. 290; Great Britain, dated December 3, 1889, No. 19,448; Switzerland, dated December 16, 1890, No. 2,513; Germany, dated August 9, 1890, No. 53,072; Belgium, dated November 80, 1889, No. 88,502,

andFrance,datedJanuary 8,1890,No.201,567,) of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to improvements in sewing-machines, and is illustrated in the accompanying drawings, the figures of which are hereinafter referred to.

The machine which constitutes the subject of this invention is of the general construction of a Singer machine, but presents the peculiarity of enabling the simultaneous formation of two parallel seams, the distance between which can be modified at will within suitable limits-such as, for example, between one and twenty millimeters.

The improved machine differs from several others which have heretofore been constructed for realizing the same object in that it has not only two needles, but also two shuttles. One of these needles is fixed, as usual, and the other is adapted to be separated from it more or less within the above-stated limits, or even beyond them. Of the two shuttles one is designed to work with the fixed needle and the other with the needle placed at variable distances. This shuttle can therefore be displaced relatively to the former shuttle the same distance whichthe needle with which it must work in unison is separated from the fixed needle. The two shuttles, being placed symmetrically with regard to the longitudinal plane of symmetry of the machine and separated more or less from each other in the longitudinal direction, according to the distance of the two seams, are displaced parallel with each other and actuated by the same mechanism. Accordingly a species of double Singer machine, so to speak, is obtained.

In the accompanying drawings the several figures represent, respectively, in Figure 1, a side elevation showing the extremity of the arm of the machine and the head connected therewith; Fig. 2, a plan of the cloth-presser with its bar shown in section. Fig.3 is aplan of the needle-plate; Fig. 4, an elevation showing the head of the arm of the machine, all the parts placed below the needle-plate being in vertical section; Fig. 5, the projection on a plane which is at a right angle to that of Fig. 4, showing the parts represented in this figure; Fig. 6, a plan of the parts which are represented in Fig. 5 below the needle-plate; Fig. 7, the plan of the two needle-holders; Fig. 8, the plan of the mechanism, showing the latter when the base-plate of the machine is turned upon the hinges by means of which it is connected to the support or table. Figs. 9 and 10 are detail views of a modified form of needle-holder for sewing curved concentric seams.

The different parts of the improved sewingmachine are denoted by the following letters: a, thread-tightener; b, fixed needle-holder; b, movable needle-holder; c, fixed needle; 0', needle adapted to be displaced according to the distancebetween the two scams; 6, clothpresser of two parts adapted to the space between the two seams; d, screw serving to adjust the cloth-presser; f, plate for the fixed needle; f, sliding plate for the needle, which can be placed at varying distances from the fixed needle; g g, notches 0r grooves in the cloth-presser; h, bar of the cloth-presser; 2', hole receiving the fixed needle; e", holes receiving the needle,placed at varying distances from the fixed needle; 3', partition between the two shuttles; Z, guide; m, shuttle-box for the shuttle, whose position is invariable; m, shuttle-box for the shuttle, whose distance from the first-mentioned shuttle can be varied; n, fixed shuttle; a, shuttle, which can be placed at variable distances from the fixed shuttle; 0, pressing-screw pp, shuttle-driver g, cavity formed to allow for the descent of the needles; 1', pin or pivot on the said shuttle-driver, which transmits to the latter the movement of the connecting-rod; t, screw serving to fix the movable needle-holder in its place; to, plate pierced with grooves for receiving the needle; 40, slot formed in the sh uttle-box m; 5, indicator for showing the position of the shuttle-box m; in, groove for the fixed needle; recess for receiving the part to.

I will now proceed to describe the principal features which the new machine presents as compared with an ordinary Singer machine. The fixed needle-holder 1), Figs. 1, 4, 5, and 7, carries the needle-holder 1), Figs. 4, 5, and 7, which is held horizontally therein and can be displaced, so as to vary its distance from the needle-holder Z). Consequently the two seams may be separated a distance varying, say, between one and twenty millimeters. This separation is regulated by means of a graduated scale, Fig. 5. The fixed needle 0, Figs. 1, 4, 5, and '7, is arranged in the ordinary manner. The movable needle 0, Figs. 1, 4, 5, and 7, can be placed symmetrically with regard to the fixed needle in such a manner that the two grooves are both arranged at the exterior upon the opposite sides of the two needles. The needle cmakes the same shifting movement as the needle-holder b.

The needle plate consists of two parts. The partf, Figs. 1, 3, 4, and 5, is fixed, while the part f, Figs. 1, 3, 4, and 5, receives the movable needle and is provided with five holes *5 and is adjustable, enabling the passage of the needle 0' whatever may be the position of the latter. The cross-bar a, secured to f, Figs. 4, 5, and 6, applied to the orifices of the holes in the plate f, is also pierced with channels guiding the needle 0 in its downward movement.

The partition 7'' is formed of three parts, the central part, Figs. 4, 5, and 6, separating the two shuttles. It is provided with the hole 7c, Figs. 4 and 6, for the passage of the fixed needle, and with the recess 70, Fig. 6, in which is placed the sliding plate u. The lateral parts Z, Figs. 4, 5, 6, and 8, perform the part of guides for the driver 1) p.

The driver 19 p, Figs. 4 and S, is formed of two parts connected by the screws 0, Figs. 4, 5, and 6, which facilitate the mounting and adjustment of the same. The cavity g permits the needles to descend freely and receives any fragments in case of breakage, these fragments being expelled by the movement of the driver p 19.

Of the shuttles 92, Figs. 4 and 6, and 71', Figs. 4, 5, and 6, each provided with its shuttle-box m, Figs. 4, 6, and S, and m, Figs. 4, 5, 6, and 8, fixed to the driver 19 p, the former that is to say, the shuttle nd0es not differ from the ordinary arrangement. As regards the shuttle n, it is not like the shuttle n; but the arrangements of both shuttles relatively to the longitudinal plane which passes through the center of the machine are symmetrical, so

that the opposite surfaces of the two shuttles placed side by side will exactly correspond. It is of course necessary to arrange the shuttle n, Fig. 5, so that its different positions correspond to those which the needle 0' will successively occupy. For this purpose the shuttle-box m, Fig. 5, is provided with a slot 4) and a graduated scale,which, like that corresponding to the needle 0, ranges from one to twenty millimeters. When in this manner the positions of the needle 0' and that of sh uttle n are once adjusted, they are maintained by turning the pressing-screw 0.

The above-described principle, on which my invention is based, can be applied to the construction of embroidering and buttonholemaking machines.

In order to allow of the machine being also used for the production of the curved parts of two seams parallel or concentric to each other, the arrangement of the movable needle-holder may be modified, as shown by Figs. 9 and 10 of the annexed drawings, Fig. 9 being a side view, part in section, and Fig. 10 a front view of said modified arrangement.

According to Fig. 9, 5 ends in a pivot z, round which the sleeve g, on which the needle c is fixed,maybe rotated in the direction shown by the arrow, Fig. 10, thus allowing of the needle 0 (which is supposed to be used to form the shortest of the two concentric seams) being put and kept out of action as long as required to compensate for the difference of length of the two seams along their bent portions. The sleeve q is fixed either in the working position, Figs. 9 and 10, or in the position which it takes after having been ro tated to the left (see the arrow in Fig. 10) by tightening the nut c on the screw 20, projecting from the front of pivot e".

As thus constructed the machine can be employed to sew parallel seams which may curve at certain points. When the seams form a curve, one of the needles must necessarily traverse a greater distance over the cloth than the other, and as the two needles reciprocate simultaneously it will be manifest that provision must be made to permit the needle forming the outer curved seam to operate to form more stitches than the needle forming the inner or shorter seam, and for this purpose I provide the modified form of needle-holder shown in Figs. 9 and 10 and just described, whereby at certain times during the operation of sewing the curved scam the needle 0' maybe swung upon its pivot, so as to be inoperative, while the needle 0 continues to operate and sew the outer curved or longer seam.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- 1. In a sewing-machine, he combination of a needle-bar, a fixed needle, and an adjustable needle secured thereto, the fixed needleplate provided with a single needle-hole and IIO the adjustable needle-plate provided with a series of needle-holes, substantially as described.

2. In a sewing-machine, the combination of a needle-bar carrying a fixed and an adj ustable needle, the presser-foot bar carrying a fixed foot, an adjustablefoot, ashuttle-driver carrying a fixed shuttle-box and an adjustable shuttle-box, shuttles carried by said shuttle-boxes, a partition arranged between said shuttle-boxes and provided upon one side with a single needle-groove and upon its other side with an adjustable plate provided with a series of needle-grooves, and guides carried by said partition and serving as ways upon which the shuttle-driver travels, substantially as described.

3. In a sewing-machine, the combination of signed my name in the presence of two sub- 30 scribing witnesses.

CARLO LURASCHI.

Witnesses:

Orronmo LAZZABI, CARILLO CATTINO. 

